Front Brake Caliper problem / adjustment. puzzled

Hi,

I just put a new front disc brake on my 2018 wr250r. Purchased OEM replacement disc. Pads are pretty new.
Put everything back together (as I have done many times before) however, here is the mystery.

Usually, after remounting the wheel I squeeze the front brake lever a few times, pressure is restored and off I go.

But this time the pressure does NOT come back. Brake fluid is fine.
Front brake lever goes all the way down to the grip. I hear a little contact, but it does not "bite".

Never happened before. It almost like the new disc is THINNER than the original.

Is there a way to increase pressure? or adjust calipers so they are closer together?

Buck

bucktuckerman wrote:

Is there a way to increase pressure?  or adjust calipers so they are closer together?

No, you can't adjust brakes like that; the problem is that you either:

1. Have air in your brake line, or
   
2. The master cylinder piston is worn out
   

Most probably it's (1), so you need to bleed the brakes; before you start make sure you have adequate brake fluid in the reservoir.

Thank you for the quick reply!

Brakes were fine prior to removal, so I suspect that you are right. #1

I'll bleed them.

thx again!

buck